Viessmann VITOSOL SERIES Technical Manual page 65

DHW cylinders
(cont.)
Cylinder capacity
Connections
Heating water flow and return
Cold water, hot water
Solar internal indirect coil set [indirect coils]
DHW circulation
Immersion heater
Information regarding continuous output
When designing the system for the continuous output as stated or cal-
culated, allow for the corresponding circulation pump. The stated con-
tinuous output is only achieved when the rated boiler output
uous output.
ELH1
ELH2/R
455
E Drain
ELH1 Connections for immersion heater
ELH2 Flanged aperture for immersion heater
HR Heating water return
HV Heating water flow
KW Cold water
Performance factor N
L
According to DIN 4708, without return temperature limit.
Cylinder storage temperature T = cold water inlet temperature +50 K
cyl
+5 K/–0 K
Performance factor N at heating water flow
L
temperature
90 °C
80 °C
70 °C
Peak output (over 10 minutes)
Relative to the performance factor N
DHW heating from 10 to 45 °C without return temperature limit.
Max. draw-off rate (over 10 minutes)
Relative to the performance factor N
With booster.
DHW heating from 10 to 45 °C.
VITOSOL
≥ contin-
WW1
Z
HV
SPR1
WW2
SPR2
HR
KW/E
16.5
15.5
12.0
.
L
.
L
l
R
R
R
R
Rp
881
918
R Inspection/clean-out aperture with flange cover
SPR1 Cylinder temperature control sensor
SPR2 Temperature sensor of the solar internal indirect coil set
WW1 DHW
WW2 Hot water from the solar internal indirect coil set
Z DHW circulation
Performance factor N
L
The performance factor N varies according to the cylinder storage
L
temperature T .
cyl
Standard values
→ 1.0 × N
■ T
= 60 °C
cyl L
→ 0.75 × N
■ T
= 55 °C
cyl L
→ 0.55 × N
■ T
= 50 °C
cyl L
→ 0.3 × N
■ T
= 45 °C
cyl L
Peak output (l/10 min) at a heating water flow
temperature of
90 °C
80 °C
70 °C
Max. draw-off rate (l/min) at a heating water
flow temperature of
90 °C
80 °C
70 °C
390
1¼
1¼
¾
1
1½
SPR2
540
521
455
54
52
46
VIESMANN
65
10